Abstract
Post treatment of titanium alloy parts obtained by Electron Beam Melting (EBM) is required before assembly due to their high roughness (Ra = 25 µm). For parts with complex geometry, chemical and electro-chemical etching are two promising processes which enhance the part surface integrity thanks to their global action. These two processes were applied to Ti6Al4V parts obtained by EBM. Their surface topography, micro hardness, dimensional and geometrical accuracy were compared. For a given removed thickness of 0.150 mm, electro-chemical etching exhibited higher efficiency to improve arithmetic roughness (∼39%) than chemical etching (∼7%).
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